Sweet, thanks. Was thinking of something similar, my van-bus is 16' long at the roof, and was thinking of building 8' awning supports with about a 12" rise- swivel mounted at the corners of the roof rack. The way I've got it figured they'd be held open (out) with gas pistons or a slam-latch, but swing back flush against and integrated into the roof rack and latch closed, if that makes sense. Would need at least one additional support in the middle for an 8' span, this could be on a swing arm as well, if I could figure out how to have them all lay flush and pretty into the walls of the roof rack. Do you think an 8ft span of canvas between supports is just too much, what would you concider to be a minimum number of supports to cover a 16ft span? If the supports where pinned or bolted in place, and you could really stretch the canvas hard against them, seems like 2-3 supports would do the job, no?
Sorry if this is a hijack of your thread here, comes with the territory a bit when you design and build something cool and unique like your awning.